Battery-sealing means



' WQE. HOLLANDAND J. M. SKINNER.

BATTERY SEALING MEANS. APPLICATION FILED .IULY B| 1919- 1,3'71,092. Patentd Mar. 1921.

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1KB Z1 iHlEES 1V1. SKINNER, PHILADELPH IA, PENNSYLVANIA,

nssrcnons no TzI-ZlILADELEl-IIA. sronacn BATTERY COMZPANYL or PHILADELPHIA, rnimsrnvnitin, .e. coneonarion or ririruernvenru.

BATTERY-SEALING BEEANS.

newness.

Specification of Letters Eatent.

Patented Mar 8, 1921.

application riled .l'uly 8, 1919. Serial ."ll'c. 309,472.

the objections inherent in the liquid seal around storage battery terminal posts as formerly constructed, by providing a con ducting post with a bushing of hard rubber or other suitable insulating material of sufficient hardness and strength to make practicable the use thereon of a comparatively fine external thread, which when employed with a nut of similar material, or of hard metal, in conjunction with the cell cover and a soft rubber gasket, shall effectually prevent leakage of the electrolyte to the outside of the cell and form a permanently tight yet easily removable seal.

We also desire to provide a novel form of bushing and storage battery terminal post which when cemented or otherwise joined together will effectually prevent leakage of electrolyte along their coacting surfaces; the invention contemplating the elimination of exposed metal surfaces in the seal between the post and the cell cover.

These objects and other advantageous ends we attain as hereinafter set forth, reference being had to the accompanying drawings in which,

Figures 1, 2, 4:, 6 and '7 are vertical sections of hushed terminal posts constructed in accordance w'th our invention;

Fig. 3 is a plan that form of the invention shown in vertical section in Fig. 2; and

Fig. 5 is a detached perspective view of certain of the parts constituting that form of the invention shown in Fig. 2.

In the above drawings 1 represents the lead alloy strap which in a storage battery cell has connected to it the terminal lugs of one group of the pates. This strap has cast integral with it an elongated cylindrical terminal post 16 extendin at 1' jles to its plane 3 of through and e d H upper end 17 pre erablyhemg eption of a suitable form of connecu lliU'lllQ a correcom i uct @hviously the terminal post may be made of hexagonal, fluted or other than cylindrical cross section without de 'yartino from our invention. 'lh s post 16 of the strap is surrounded and 1'- ..osed, between the cover and'strap body, by an insulating bushing 7 molded or otherwise so formed as to extend into a recess formed between it and a flange 6, which in Figs. 1 and 4;, is internally threaded or serrate-: and 1s concentric with said post. The upper end of this lnish'ing has a relatively fineexternal thread for the reception of a sealing nut 13 designed to draw a sealing gasket 12 against the under side of the cover 10, there being an annular, upwardly flanged collar 8 on said bushing adjacent said cover for the reception and support of this gasket.

in Figs. 2, 3 and 5, we have shown the insulating bushing 8" as cemented to the flange 6 and to the post 16 so as to effectually prevent leakage and it is positively held from turning relatively to said post by an internal key projection 21 fitting a suitable keyway in the latter. If desired this form of the invention no ay he modified as shown in Fig. 4, in which the bushing, loosely fitted to the post, is threaded into the flange 6 so as to screw down on and compress a soft rubber packing ring or gasket 24z'placed at the bottom of the cavity formed by said ll ire and it also may be cemented as at 23 or 1 .herwise connected to the post so as to form a liquid-proof joint therewith. In some cases the bushing may be cemented in place when cold or it may be heated and shrunk on the post either with or Without cement.

In that modification of the invention shown in Fig. 6 the flange 6 has been omitted and the lower part of the terminal post 16 has been formed with a flange or annular extension upon which is seated the packing washer or gasket 12 for preventing leakage between said post and the cover 10. in this "event longie above said bushing after this has been put in place. If desired the threaded bushing may be molded and cured in place on the terminal post 16 as shown in Fig. 7, in which case said post preferably has holes or depressions for the reception of integral proj ctions 27 from the bushing whereby its rotation as well as longitudinal movement relat vely to the post is effectually prevented.

In this construction, as well as in the others illustrated,-the acid or other electrolyte is effectually excluded from the post 16,

so that it cannot leak along the same and corrode its surface or escape between it and the bushing. Likewise there is no possibility of the escape of electrolyte past the sealing gasket between the bushing and the cover since the ii'isulating material of which the bushing and cover are made does not corrode or tend to draw electrolyte over its surface as does metal. Moreover because of the great compression of the gasket 12, which is made possible by the use of material which will permit relatively fine threading of the bushing and its nut 13 as compared with the hard lead heretofore used, the joint between the cover 10 and said bushing may be made and kept liquid tight, while the sealing nut may be readlly removed and replaced as often as desired without'danger of damaging or stripping the threads.

We claim:

1. The combination of a battery cell strap; a conductor projecting therefrom; an annular flange on the strap spaced away from and substantially concentric with said conductor; with an insulating bushing surrounding the conductor and extending into v the cavity between the same and the flange to form a liquid-tight joint therewith.

2. The combination of a battery cell strap; a conductor projecting therefrom; withv an insulating bushing surrounding said conductor and having a serrated connection with the strap.

3. The combination of a battery cell cover; a conductor projecting through the cover; with an insulating bushing surrounding the conductor and making liquid-proof joints with it and with the cover.

4. The combination of a battery cell cover; a conductor projecting through the cover; with an insulating bushing structurally independent of the cover making a liquid-proofv joint with the conductor and extending around the same through the cover.

5. The combination of a battery cell cover; .a conductor projecting through the cover; an insulating bushing making a liquid-proof joint with the conductor and extending around the conductor through the cover; with means for forming a. liquidproof joint between the bushing and the cover.

6. The combination of a battery cell cover; a conductor projecting through the cover; an insulating bushing extending around the conductor in removable engagement with the cover; with means for mak- .ing a liquid-proof joint between the conductor and the bushing.

7. The combination of a battery cell strap; a post conductor electrically connected to said strap and extending at right angles thereto;-a flange on the strap surrounding the post conductor; and an insulating bushing threaded into the space between the post conductor and the flange.

8. The combination of a battery cell cover; a cell post projecting through an' cell post projecting through an opening inthe cover; an insulating bushing surrounding the post and making liquid-tight connection therewith, said bushing including an annular collar; a gasket confined between said collar and the cover; with a nut threaded on the bushing outside of the cover for drawing the collar and cover into liquidtight engagement with the gasket.

11'. The combination of a battery cell strap having a laterally projecting flanged portion; a battery cell. having a cover through which said projecting port-ion extends; and packing between said flange of the projecting portion and the cover.

12. The combination of a battery cell strap having a laterally projecting flanged portion; a battery cell having a cover through which said projecting portion extends; packing between said flange of the propecting portion and the cover; with means for clampingsaid packing 111 place.' 18. The combination of a battery cell strap having a laterally projecting flanged portion; a battery cell having a .cover through which said projecting portion extends; packing between said flange of the projecting portion and the cover; with means for clamping said packing in place, consisting of a bushing held to the projecting portion of the strap, and a nut threaded thereon in engagement with the cover.

14.. The combination of a battery cell strap havin%1 a flanged terminal poet; a battery cell aving a cover through Whiuiii said post projects; packing between the post flange and the cover; an insulating;- bush- 5 mg rigicl1y held. to the post against longi- 10 having a, flanged terminal post; a battery cell having a cover through which said postand the cover; an insulating bushing structurally independent of the cover rigidly hel l-gt0 the post against lbngituclinal and rotary, movement; and means coecting' with the bushing "for clamping the packing in place.

In Witness whereof we afiix our-signatures.

WALTER E. HOLLAND. JAMES M. SKINNER. 

